make install error with --target=arm-apple-ios

[tamird]

./configure --target=arm-apple-ios && make clean && make && make install
-- SNIP --
cleaning destination tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image
prepare: tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image/bin
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prepare: tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image/lib/libterm-*.dylib
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prepare: tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image/lib/rustlib/x86_64-apple-darwin/lib/libterm-*.dylib
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prepare: tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image/lib/rustlib/x86_64-apple-darwin/lib/libcompiler-rt.a
prepare: tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image/lib/rustlib/arm-apple-ios/lib
prepare: tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image/lib/rustlib/arm-apple-ios/lib/liblibc-*.rlib
prepare: tmp/dist/rustc-1.0.0-dev-x86_64-apple-darwin-image/lib/rustlib/arm-apple-ios/lib/libstd-*.a
ls: x86_64-apple-darwin/stage2/lib/rustlib/arm-apple-ios/lib/libstd-*.a: No such file or directory
usage: install [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]
               [-o owner] file1 file2
       install [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]
               [-o owner] file1 ... fileN directory
       install -d [-v] [-g group] [-m mode] [-o owner] directory ...
make[1]: *** [prepare-target-arm-apple-ios-host-x86_64-apple-darwin-2-dir-x86_64-apple-darwin] Error 64
make: *** [install] Error 2

Full gist: https://gist.github.com/tamird/111eb6d0d0f5aa7ceda7

[huonw]

cc @brson

[tamird]

cc @vhbit since you've been contributing iOS patches. This same error still repros after #20699 with:

./configure --target=aarch64-apple-ios && make clean && make && make install

Are you able to successfully build a cross-compiler?

[vhbit]

Are you able to successfully build a cross-compiler?

@tamird there are 2 different things: building and installing. What fails is install phase and I believe I have kind of dirty hack for it in my fork, but will try to find a correct solution and issue PR soon.

[tamird]

@vhbit this one vhbit@d4fb19c ?

[vhbit]

@tamird yep

[tamird]

@vhbit cool, would you mind submitting that PR?

[vhbit]

@tamird since PR is going to be open for a while considering current bors queue, I have to mention that in general when you need up-to-date Rust for iOS you can either built it by yourself from https://github.com/vhbit/rust or use a prebuilt version from https://github.com/vhbit/rust/releases. It may lag a bit (usually <= 1 day) but it is guaranteed to build (as iOS is not on Rust official buildbots and master is broken sometimes).